Systematics of Mycosphaerella species associated with the invasive weed Fallopia japonica, including the potential biological control agent M-polygoni-cuspidati
Systematics of Mycosphaerella species associated with the invasive weed Fallopia japonica, including the potential biological control agent M-polygoni-cuspidati
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DOI：
10.1007/s10267-008-0471-z
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发表时间：
2009-05-01
期刊：
影响因子：
1.4
通讯作者：
Tsuchiya, Kenichi
中科院分区：
文献类型：
--
作者：
Kurose, Daisuke;Evans, Harry C.;Tsuchiya, Kenichi
原产于日本，日本番荔枝，最常被称为日本虎杖，是一种非常有问题的入侵杂草，特别是在英国和北美。在日本调查该植物的天敌时，收集到两种球腔菌。其中一个被确定为M。i-cuspidati，并重新描述和neotypified。引起F.在日本的整个自然分布区，它是缺席的主机的异国情调的范围。M. cuspidati到F.日本在其起源中心，连同其对宿主适合度的严重影响，表明这是一种共同进化的天敌，具有作为这种生态和经济上重要的杂草的长期管理的经典生物控制剂的高潜力。在田间，真菌的生命周期缩短，只形成精子和假子囊（子囊）。子囊孢子是感染的主要来源，研究表明，来自体外培养的菌丝体也具有感染性，菌丝主要通过气孔穿透。另一种未描述的球腔菌属物种与M.本文提出新种M.岛羽藻。这两个物种已经研究了文化，形态学和分子系统发育的方法。
Native to Japan, Fallopia japonica, most frequently referred to as Japanese knotweed, is a highly problematic invasive weed, particularly in the UK and North America. During surveys for natural enemies of this plant in Japan, two species of Mycosphaerella were collected. One of these was identified as M. polygoni-cuspidati, and is redescribed and neotypified. Causing a damaging leaf spot disease of F. japonica throughout its natural range in Japan, it is absent from the host's exotic range. The restriction of M. polygoni-cuspidati to F. japonica in its center of origin, together with its severe impact on host fitness, indicates that this is a coevolved natural enemy with high potential as a classical biological control agent for the long-term management of this ecologically and economically important weed. In the field, the fungus has a reduced life cycle, with only spermogonia and pseudothecia (ascomata) being formed. Ascospores are the primary source of infection, and studies show that the mycelium from in vitro cultures is also infective and hyphae penetrate mainly via the stomata. A further, undescribed species of Mycosphaerella co-occurs with M. polygoni-cuspidati, here proposed as the new species M. shimabarensis. Both species have been studied using cultural, morphological and molecular phylogenetic methods.